I have Python 3.7.1 installed on Windows 7 from www.python.org. When I want to \"pip install pylab\" I receive the following message: \"pip is configured with locations that
According to your comment with the PATH variable you are missing the right entries to this so it cannot find the libraries and so on.
If you reinstall python in the first screen you have an option ‘Add Python x.x.x to PATH’ enable this option and then retry what you did.